J. Nachtman
A5090915386- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Distributed and Parallel Computing Systems
- Gamma-ray bursts and supernovae
- Atomic and Subatomic Physics Research
- Muon and positron interactions and applications
- Scientific Computing and Data Management
- Nuclear reactor physics and engineering
- Radiation Therapy and Dosimetry
- Stochastic processes and financial applications
- CCD and CMOS Imaging Sensors
- International Science and Diplomacy
- Planetary Science and Exploration
- Particle accelerators and beam dynamics
University of Iowa
2016-2025
Institute of High Energy Physics
2014-2024
A. Alikhanyan National Laboratory
2022-2024
University of Antwerp
2024
Johns Hopkins University
2000-2023
Texas A&M University
2017-2021
University of Wisconsin–Madison
2018
Rutgers, The State University of New Jersey
2014-2016
Austrian Academy of Sciences
2016
University of Tennessee at Knoxville
2016
We present an analysis of the discovery reach for supersymmetric particles at upgraded Tevatron collider, assuming that SUSY breaking results in universal soft parameters grand unification scale, and lightest particle is stable neutral. first a review literature, including issues unification, renormalization group evolution supersymmetry effect radiative corrections on effective low energy couplings masses theory. consider experimental bounds coming from direct searches those arising...
Abstract JEM-EUSO is an international program for the development of space-based Ultra-High Energy Cosmic Ray observatories. The consists a series missions which are either under or in data analysis phase. All instruments based on wide-field-of-view telescope, operates near-UV range, designed to detect fluorescence light emitted by extensive air showers atmosphere. We describe simulation software ESAF framework and explain physical assumptions used. present here implementation JEM-EUSO,...
Abstract The complexity of modern cosmic ray observatories and the rich data sets they capture often require a sophisticated software framework to support simulation physical processes, detector response, as well reconstruction analysis real simulated data. Here we present EUSO-Offline framework. code base was originally developed by Pierre Auger Collaboration, portions it have been adopted other collaborations suit their needs. We extended this fulfill requirements Ultra-High Energy Cosmic...
This review summarizes the state of art in searches for supersymmetry at colliders on eve LHC era. Supersymmetry is unique among extensions standard model being motivated by naturalness, dark matter, and force unification, both with without gravity. At same time, weak-scale encompasses a wide range experimental signals that are also found many other frameworks. We recall motivations various models their distinctive features. then comprehensively summarize neutral charged Higgs bosons...
We present the status of development a Cherenkov telescope to be flown on long-duration balloon flight, Extreme Universe Space Observatory Super Pressure Balloon 2 (EUSO-SPB2). EUSO-SPB2 is an approved NASA mission that planned fly in 2023 and precursor Probe Multi-Messenger Astrophysics (POEMMA), candidate for probe-class mission. The purpose on-board classify known unknown sources backgrounds future space-based neutrino detectors. Furthermore, we will use Earth-skimming technique search...
Predictions of fiducial cross sections, differential sections and lepton charge asymmetry are presented for the production $W^{\pm}$ bosons with leptonic decay up to next-to-next-to-leading order (NNLO) in perturbative QCD. Differential W boson computed as a function pseudorapidity defined region $pp$ collisions at $\sqrt{s}=13$ TeV. Numerical results section predictions latest modern PDF models next-to-leading (NLO) NNLO. It is found that CT14 NNPDF 3.0 NNLO QCD corrections about 4$\%$...
The Extreme Universe Space Observatory on a Super Pressure Balloon 2 (EUSO-SPB2) flew May 13$^{\text{th}}$ and 14$^{\text{th}}$ of 2023. Consisting two novel optical telescopes, the payload utilized next-generation instrumentation for observations extensive air showers from near space. One instrument, fluorescence telescope (FT) searched Ultra-High Energy Cosmic Rays (UHECRs) by recording atmosphere below balloon in near-UV with 1~$\mu$s time resolution using 108 multi-anode photomultiplier...
The Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) is designed to identify the sources of Ultra-High-Energy Cosmic Rays (UHECRs) and observe cosmic neutrinos, both with full-sky coverage. Developed as a NASA Probe-class mission, POEMMA consists two spacecraft flying in loose formation at 525 km altitude, 28.5 deg inclination orbits. Each hosts Schmidt telescope large collecting area wide field view. A novel focal plane optimized UV fluorescence signal from extensive air showers...
With the discovery of non-zero value $\theta_{13}$ mixing angle, next generation long-baseline neutrino (LBN) experiments offers possibility obtaining statistically significant samples muon and electron neutrinos anti-neutrinos with large oscillation effects. In this document we intend to highlight importance Near Detector facilities in LBN both constrain systematic uncertainties affecting analyses but also perform, thanks their close location, measurements broad benefit for physics goals. A...
We propose a like-sign dilepton search for chargino-neutralino production in p-pbar collisions at sqrt(s) = 1.8 TeV, which complements the previously published trilepton by CDF detector using Fermilab Run I data. Monte Carlo predictions signal and background efficiencies indicate significant increase sensitivity to compared traditional analysis alone.
We present new results from the like-sign dilepton search for chargino-neutralino [Formula: see text] production in collisions at text], which complements previously published trilepton with CDF detector using Fermilab Run IB data. Monte Carlo calculations of signal efficiency and backgrounds, as well estimates certain back grounds taken data, indicate a significant increase sensitivity to compared traditional analysis alone.
Automation and quality control techniques for 2S PS sensor modules the CMS Outer Tracker HL-LHC era have been developed at Silicon Detector facility Fermilab. Examples include a laser scanning procedure to check manufacturing specifications modules, an automated gluing process accurately assemble modules. Processes were verified documented production stage of Tracker.
The charge collection will be performed by two anode planes placed at the top and bottom of module, each composed stacked layers a perforated PCB technology with electrode strips. photon detection system (PDS) make use large size X-Arapuca tiles distributed over three planes. One plane consist horizontal arrangement double sided installed on high voltage cathode vertical planes, longest cryostat membrane walls. A light active coverage 14.8% 7.4% laterals should allow improvements in low...
The bb̄(Υ) mesons appear to be produced in the initial PbPb collision at 2.76 TeV per nucleon pair followed by partial melting hot quark-gluon plasma. In sharp contrast, cc̄(J/Ψ) seem more likely formed recombination hadronization stage. Bc mesons, with one quark of each kind are seldom seen pp collisions because a particle-antiparticle requires simultaneous production four heavy quarks. Although family have been predicted, only ground state has seen. If cc̄ recombination, it could expected...
In preparation for collecting proton-proton collisions from the LHC at a center-of-mass energy of 13 TeV and rate 40MHz with increasing instantaneous luminosity, CMS collaboration prepared an array triggers utilizing jets missing transverse searches new physics frontier as well SM precision measurements. The trigger system must be able to sift through collision events in order extract interest 1kHz, applying sophisticated algorithms adapted fast effective operation. Particularly important is...
Quarkonium production has long been considered an ideal means of investigating QCD and other new phenomena. Measurements simultaneous quarkonium states are important for the understanding mechanism; e.g. SPS (single parton scattering) versus DPS (double scattering). from ATLAS, CMS, LHCb, D0 reported.